Frank McCourt Gearing Up for Legal War with MLB

4/21/2011 3:00 PM PDT

Frank McCourt Gearing Up for Legal War with MLB

Sources connected with Frank McCourt tell TMZ ... the L.A. Dodgers owner has his lawyers preparing a case against Major League Baseball as well as Commissioner Bud Selig.

Sources
familiar with the case tell us ... Frank's lawyers are researching and
preparing legal docs so they can go to court and ask for a mandatory
injunction, forcing the MLB and Selig to reinstate McCourt as the man in
charge of the day-to-day operation of the team.

Our sources say the essence of McCourt's case -- that Selig was
allegedly "arbitrary and capricious" in yanking McCourt's authority.

We're told one of the arguments -- that Selig and the MLB have tolerated
bigger problems with other teams, including the New York Mets, which is
reportedly $450 million in debt.

Our sources say legal action "is not imminent" -- meaning it won't be
filed today. But sources say it could still be filed as early as Friday.